Targeting apparatus connecting to locking nails for the correction and fixation of femur deformity of a child

Abstract

A targeting apparatus for the correction of the deformity in proximal femur of a child is disclosed and includes a retention assembly; a cylindrical nail retention member tapered toward its half-spherical bottom end and including an upper through hole, a lower through hole, and a top cavity having inner threads for releasably secured to the retention assembly; a first locking nail including a forward threaded portion, an enlarged head, and a retaining recess in the head thereof; and a second locking nail including a forward threaded portion, an enlarged head, and a retaining recess in the head thereof. The invention has the advantages of reducing the area of wound when implanting the locking nails in the femur and saving labor during surgery.

1 . A targeting apparatus for correcting the deformity in a proximal femur of a child, comprising:
 retention means;   a cylindrical nail retention member tapered toward its half-spherical bottom end and including an upper through hole, a lower through hole, and a top cavity having inner threads for releasably secured to the retention means;   a first locking nail including a forward threaded portion, an enlarged head, and a retaining recess in the head thereof; and   a second locking nail including a forward threaded portion, an enlarged head, and a retaining recess in the head thereof.   
   
   
       2 . The targeting apparatus of  claim 1 , wherein the first locking nail is a cannulated screw. 
   
   
       3 . The targeting apparatus of  claim 1 , wherein the second locking nail is a cortical screw. 
   
   
       4 . The targeting apparatus of  claim 1 , wherein the first locking nail has a diameter larger than that of the second locking nail. 
   
   
       5 . The targeting apparatus of  claim 1 , wherein the retention means comprises:
 a handle comprising an upright section having transverse upper and lower guide holes, a horizontal section having a downward extension having a longitudinal channel therethrough, and an inclined section interconnecting the upright and the horizontal sections wherein the cavity is adapted to align with the channel;   a retention assembly comprising a fastening unit including a shank having a threaded end, a head, and a recess having inner threads in the head thereof; and a retention unit including a head and a shank having outer threads adapted to threadedly secure to the recess of the fastening unit; and   a fastening assembly comprising a joining sleeve including a head and a central bore through the joining sleeve; and a screw driver including a handle and a shank,   wherein (i) the threaded end of the fastening unit is adapted to threadedly secure to the cavity after inserting through the channel into the cavity; (ii) the head of the retention unit is adapted to pound to implant the nail retention member in the femur; (iii) the femur is adapted to cut into a neck and a shaft; the nail retention member is adapted to position in the femoral neck and the femoral shaft by turning the handle; (iv) the first locking nail is adapted to insert through the upper through hole, the joining sleeve is adapted to insert through the upper guide hole until the head of the first locking nail is received in the front end of the joining sleeve, the shank of the screw driver is adapted to insert into the bore of the joining sleeve to engage the retaining recess of the first locking nail, and the screw driver is adapted to drive the first locking nail into the femoral neck; and (v) the second locking nail is adapted to insert through the lower through hole, the joining sleeve is adapted to insert through the lower guide hole until the head of the second locking nail is received in the front end of the joining sleeve, the shank of the screw driver is adapted to insert into the bore of the joining sleeve to engage the retaining recess of the second locking nail, and the screw driver is adapted to drive the second locking nail into the femoral shaft.   
   
   
       6 . The targeting apparatus of  claim 5 , wherein the retention means further comprises a sleeving member including a head, a shank, and a central bore through the shank thereof, and wherein the shank of the sleeving member is adapted to insert into the bore of the joining sleeve.